Paper bag



(Model.)

L. D. BENNER. Paper- Bag.

Patented June 7, I881.

'inesses. MW

N. PETERS. FhatvLithogr-lpher, Waahingmn. D. c.

NITED STATES PATENT OFFICE.

LORENZO D. BENNER, OF GALESBURG, ASSIGNOR TO LUOIUS Gr. FISHER, JR, OF CHICAGO, ILLINOIS.

PAPER BAG.

SPECIFICATION forming part of Letters Patent No. 242,499, dated June '7, 1881. Application filed March 18, 1881. (Model.)

To all whom it may concern:

Be it known that I, LORENZO D. BENNER, of Galesburg, in the county of Knox and State of Illinois, have invented a new and Improved Bag or Sack f and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of the specification.

My invention is a square-bottom bag in which the side portions are of uniform thickness throughout. The bottom is closed by seams, which securely seal the same without being unduly thick at any point, and are so arranged that the bag will readily open and assume its form in the act of fillin g.

In the drawings, Figure l is a view illustrating the form of sheet from which a bag can be made; Fig. 2, a view showing the shape of the edge of the sheet when formed into a tube and flattened; Fig. 3, a view showing the form of the edge when the tube is opened; Figs. 4. to 6, views illustrating the bag at different stages of the manufacture Figs. 7 and 8, views showing the completed bag folded; Fig. 9, a perspective view showing the completed bag inverted and opened.

The bag may be made from a sheet or from a continuous tube, and the steps in the manufacture may be performed wholly or in part by machinery, and may be varied without altering the essential features of the product.

I do not here describe the machinery nor claim any special process, as these will form 3 5 the subjects of separate applications for Letters Patent; and for the purposes of this application I shall describe the bags as made from sheets.

The form to which each sheet is cut is shown no in Fig. 1, which is substantially an oblong or square blank, but out to form at one edge (which will be at the bottom of the bag) two tongues or lips, B B, so situated that when the edges of the sheet are pasted together these 5 tongues will be at the edges of the bag, as shown in Figs. 2 and 3. The sheetmay also be cut so as to leave a tongue, A, at one side, projecting beyond the edge 3 of the other side, as shown in Figs. 1, 2, and 4.

In the process of manufacturing the bag the side portions are brought to such a position that the central point, 8, of each tongue B will be on a line with the body of the bag, as shown in Figs. 4 and 5, in which the side portions are flattened, so that the transverse form of 5 5 the folded sheet or tube corresponds to that of the letter H, Fig. 5. It should be understood, however, that this mode of folding is not essential, it only being necessary to bring the point 8 in line with the body. The lip A is then folded down and pasted, as in Fig. 6.

One or both sides, 15 t, of the folded portion is then bent over on a diagonal line, 10, as shown in Figs. at and 6, and this portion is pasted down to the side it and to the body of the bag, 6 where it overlies the same. The other side is then folded in like manner, or both sides may be folded down simultaneously. In any case the tip or end of the tongue B will be folded over, across, and close the edge of the body portion as far as it projects over the same, as shown in Fig. 6, thereby effectually sealin g the-bag at this point.

It is apparent that where the tongues are long enough the folded lips may extend from 7 5 each edge to the center of the bag, thereby closing the end without necessarily using the tongue A.

After the lips are thus folded and pasted down the bag will be complete, and the sides may be folded into the bellows shape shown in Fig. 8, or otherwise. However folded, the mere act of filling the bag will cause its bottom to assume the shape shown in Fig. 9.

The seams of the bag thu's constructed are 8 not of undue thickness. They are arranged so as to add to the strength of and effectually and securely close the bag, especially at the corners, and are of a character to be formed without the necessity of folding in the bag to a 0 bellows shape during the process of manufacture, or of making it on a former; nor is it necessary to open the bag after folding over the end, or to tuck in the corners after pasting and securing the seams. Thefolding down and pasting of the corners, in effect, completes the bag in form ready for use, and when the bag is made from a continuous tube, and the tongues B are wide enough to meet at the center, this folding and pasting down of the cor roe ners constitutes the entire process of making the ba As the side folds, q, extend from the mouth to the bottom through only a single thickness of material, the bag assumes its shape in folding and filling more readily than when the seam terminates at a portion of the bag adja cent to the bottom of two or more thicknesses.

I claim 1. A square-bottom bag in which prolongations of the side portions are folded down and secured to the bottom, and in which the sides consist each of one thickness of paper thronghout, substantially as set forth.

LORENZO D. BENNER.

Witnesses J oI-IN MGFARLAND, JOHN C. STEWART. 

